181results about How to "Improve forwarding speed" patented technology

A guided aerial delivery device which can be used to safely and accurately deliver a payload and supplies from an aircraft in flight to a specific target location in a reduced time. The aerial delivery device uses an overloaded ram-air drogue parachute controlled by a guidance system to steer the payload towards the intended target. When a selected altitude is reached, a recovery parachute is activated and the payload descends the remaining distance under the recovery parachute.

A compound aircraft features variable incidence wings, a thruster, a rotor and a clutch connecting the engines to the rotor. Upon reaching a suitable forward speed, the control system of the compound aircraft unloads the rotor and disengages the clutch, disconnecting the rotor from the engines. The control system configures the cyclic and collective pitch effectors to cause the rotor to autorotate. The control system selects an autorotation rotational speed that is adequately rapid to prevent excessive deformation of the rotor blades due to aerodynamic forces acting on the blade and that is adequately slow to prevent excessive compressibility effects.

A guided aerial delivery device which can be used to safely and accurately deliver a payload and supplies from an aircraft in flight to a specific target location in a reduced time. The aerial delivery device uses an overloaded ram-air drogue parachute controlled by a guidance system to steer the payload towards the intended target. When a selected altitude is reached, a recovery parachute is activated and the payload descends the remaining distance under the recovery parachute.

The invention is related to an electrical powered tail rotor (1) of a helicopter comprising a housing (2) around the tail rotor (1), and at least one permanent magnet energized synchronous motor with a stator (6, 7) with an increased number of poles (9). Said at least one synchronous motor is integrated as a torus (8) around an opening of the housing (2) encompassing the tail rotor (1). Blades (4) of the tail rotor (1) are fixed to at least one rotating component (10, 11) of said at least one synchronous motor. Supply means provide for electric energy to said at least one synchronous motor. Blade pitch control means are provided at the torus (8).

The invention discloses a method and device for forwarding a message. The method includes: a kernel-state receiving process stores the message received by a network card in a sharing internal memory and notifies a user-state process; the user-state process maps the physical address of the sharing internal memory to the virtual address of the user-state process and then extracts the message from the sharing internal memory and processes the message; the user-state process stores the processed message in the shearing internal memory and notifies a kernel-state transmitting process; the kernel-state transmitting process transmits the processed message through the corresponding network card. By the method, copying of the message from kernel space to application space is avoided, message forwarding speed is increased, and system resource utilization rate can be increased.

A compound aircraft features variable incidence wings, a thruster, a rotor and a clutch connecting the engines to the rotor. Upon reaching a suitable forward speed, the control system of the compound aircraft unloads the rotor and disengages the clutch, disconnecting the rotor from the engines. The control system configures the cyclic and collective pitch effectors to cause the rotor to autorotate. The control system selects an autorotation rotational speed that is adequately rapid to prevent excessive deformation of the rotor blades due to aerodynamic forces acting on the blade and that is adequately slow to prevent excessive compressibility effects.

The invention discloses a multi-radar remote monitoring system and method based on the WebSocket. Operating state information of radars is uniformly packaged in a CAT002 format and sent to a center server side, and after receiving the operating state information, in the CAT002 format, of the radars, the center server side analyzes and converts the operating state information into radar operating state messages in a JSON format, and then pushes the radar operating state messages to a Web client side in real time through Websocket connection; after receiving the radar operating state messages in the JSON format through Websocket connection, the Web client side displays operating states of radar stations in real time with electronic map data combined. Real-time performance of obtaining the operating state information of the radars through the Web client side is effectively promoted, and the operating states of the multiple radar stations can be monitored in real time in an unified mode.

The invention discloses a method of realizing IPv4 / IPv6 network protocol transmission using network processor; it can fulfill quick transmission of report to make IPv4 host computer and IPv6 host computer communicate freely. The technique scheme is: the invention uses network processor to divide report into following three types: dialogue head package from IPv6 sub net host computer to IPv4 sub net host computer, dialogue head package from IPv4 sub net host computer to IPv6 sub net host computer, report of built dialogue. The invention can be used in protocol transmission of IPv4 / IPv6 sub network host computer.

The invention relates to a multi-protocol industrial communication safety gateway and a communication method with the gateway applied. In the data communication process, a source gateway encrypts data through a secret key management mechanism module and a VPN encryption and decryption module and then sends the data to a target gateway. The target gateway decrypts the data through the VPN encryption and decryption module, and provides safe detection and control service for data communication through a safety domain safety protection module; if the data are safe, secret key decryption is carried out on application layer data, the types of the application layer data are judged, an application management safety module is used for management if the application layer data are application management data, and an application layer message detecting and filtering module is called for detecting and filtering messages if the application layer data are application layer messages. The mode of combination of the VPN encryption and decryption, the secret key encryption and decryption, and the application layer message detecting and filtering is adopted for communication safety assurance; the safety domain safety protection and the application safety management are adopted for gateway application safety assurance.

The invention is related to an electrical powered tail rotor (1) of a helicopter comprising a housing (2) around the tail rotor (1), and at least one permanent magnet energized synchronous motor with a stator (6, 7) with an increased number of poles (9). Said at least one synchronous motor is integrated as a torus (8) around an opening of the housing (2) encompassing the tail rotor (1). Blades (4) of the tail rotor (1) are fixed to at least one rotating component (10, 11) of said at least one synchronous motor. Supply means provide for electric energy to said at least one synchronous motor. Blade pitch control means are provided at the torus (8).

The invention provides a message forwarding method and a message forwarding device. The method comprises the following steps: receiving a message to be forwarded by a network device, and acquiring a 5-tuple group; finding out whether a message forwarding session table matched with the 5-tuple group exists in the existing message forwarding session tables, if so, processing the message to be forwarded through a processing manner recorded in the matched message forwarding session table, and transmitting the processed message; if not, finding out whether a blacklist session table matched with the 5-tuple group exists in the existing blacklist session tables, if so, discarding the message to be forwarded, and if not, processing the message to be forwarded by the network device; if the message to be forwarded is processed and successfully transmitted, establishing the message forwarding session table of the 5-tuple group; recording the processing manner into the message forwarding session table; if the message to be forwarded is discarded by any one module in processing, establishing the blacklist session table of the 5-tuple group; and recording a discarding module and discarding reasons into the blacklist session table. With the adoption of the message forwarding method and the message forwarding device, CPU (central processing unit) consumption can be reduced, and the forwarding efficiency is improved.

A tail assembly (10) for a rotorcraft (20), the tail assembly (10) comprising a first stabilizer (3) extending transversely on either side of an anteroposterior plane (P1), and a second stabilizer (4, 4″) extending in elevation. Two propellers (31, 41) positioned on either side of the anteroposterior plane (P1) provide the rotorcraft (20) with at least part of its yaw control and its propulsion. The axes of the two propellers (31, 41) are situated in a plane substantially parallel to the horizontal plane (P3) and they intersect at a position in the anteroposterior plane (P1) of the rotorcraft (20) that is located between the front end of the rotorcraft (20) and the propellers (31, 41). Using both propellers (31, 41) of the tail assembly (10) simultaneously makes it possible to provide the rotorcraft (20) with longitudinal thrust while conserving its transverse thrust for the anti-torque function, it being possible to control these two thrusts independently.

The invention provides a safe socket character layer protocol message forwarding method, device and system. The method includes steps of receiving resource request message which is transmitted by user and is safe socket character layer protocol SSL message, adopting SSL to encrypt; adding transparent transmission information in the resource request message if the resource requested by the resource request message is ecdemic resource, wherein the transparent transmission information is used for informing each exchange node for transmitting the resource request message, the transmission control protocol TCP protocol is directly used for transmitting the resource request message while not needing to carry out encryption decryption operation of SSL to the resource request message when transmitted between each exchange node; and forwarding the resource request message containing the transparent transmission information. The invention employs message transparent transmission technology, thereby reducing encryption and decryption operation when transmitting the message and increasing network performance.

This invention discloses one operator boundary point, virtual special local network communication method and system, wherein the method comprises the following steps: symmetric interfacing virtual special local network service user point to entrance operator by QinQ form type to analyze message two layers of head and common labels; according to analysis head part and common label adding relative transfer information in self MAC transfer list and sending the message tot eh operator boundary point; exit operator boundary point receives message to analyze label and sends the message to user point; user boundary point analyzes private network label.

The invention relates to network communication technology, in particular to a message routing and switching technique in wide-area network communication. A message routing and switching device comprise a host CPU, a three-layered switching unit, and a wide-area network sub-card. The host CPU obtains and maintains a first mapping relation and a second mapping relation, and respectively transmits to the three-layered switching unit and the wide-area network sub-card; the three-layered switching unit, after receiving the message, searches the first mapping relation and obtains virtual channel identification information, and transmitting the message to the wide-area network sub-card when the virtual channel identification information is added to the message; the wide-area network sub-card, after receiving the message, searches the second mapping relation and obtains a corresponding wide-area network interface virtual channel number, and transmits the message to the corresponding wide-area network interface virtual channel. In addition, the invention also provides a message routing and switching method. In the invention, the wide-area network sub-card assists the three-layered switching chip to replace the host CPU to carry out message retransmission in the wide-area network, so as to improve the speed of message retransmission.

A tail boom capable of creating propulsive force during forward flight to increase the forward speed is provided. A tail boom producing a force that cancels out a torque effect due to the Coanda effect by forcing airflow generated by a propeller disposed on an upstream side downward through a slit penetrating in the thickness direction and provided at a lower part of one side surface is configured such that the airflow generated by the propeller contributes to the propulsive force during forward flight.

The invention discloses a combined type tilting rotor-wing helicopter. The aircraft has characteristics of vertical ascending and descending, hovering and high-speed forward flight; compared with a traditional helicopter, the flight speed is high; compared with a tilting rotor-wing aircraft, the control reliability is high. The aircraft comprises a main lifting power rotor wing, a tilting rotor wing, a tilting airfoil, a fixed airfoil, a fuselage body and an undercarriage. The main lifting power rotor wing is a coaxial reversing propeller double-rotor-wing system; the tilting rotor wing and the tilting airfoil can be rotated through an actuating mechanism along a rotary shaft. The aircraft needs to undergo a vertical flight state, a transition flight state and a vertical flight state from takeoff to flat flight. In a whole flight process, the main lifting power rotor wing provides main lifting power to the aircraft all the time, and attitude of the aircraft is mainly controlled through tilting of the tilting rotor wing and the tilting airfoil. The combined type tilting rotor-wing helicopter has advantages of the tilting rotor wing and a coaxial helicopter, and mechanism and control defects of the tilting rotor wing and the coaxial helicopter are overcome; meanwhile, the reliability of the mechanism and a control method is improved.

The invention discloses a solid pulse plasma thruster with high propellant utilization rate and a working method, and belongs to the technical field of aerospace propulsion of micro-satellites. The solid pulse plasma thruster with high propellant utilization rate comprises a constant-force spring, an upper insulating plate for fixing a propellant, a semiconductor spark plug, a permanent magnet for increasing impulse bit, a cathode plate, a permanent magnet for increasing specific impulse, an anode plate, a high-voltage power supply, a main spark-gap capacitor, a diode, a lower insulating plate for fixing the propellant and a solid propellant; gas storage cavities for reducing the forward movement speed of neutral gas are respectively formed in the cathode plate and the anode plate; the distance between the cathode plate and the anode plate is increased on the rear sides of the gas storage cavities; tail ends, which are close to a nozzle, of the cathode plate and the anode plate are parallel to each other; the permanent magnet for increasing the impulse bit is added in the direction which is opposite to the direction of a self-inductance magnetic field; and the permanent magnet for increasing the specific impulse is added in the direction which is the same as the direction of the self-inductance magnetic field. The propellant utilization rate of the solid pulse plasma thruster can be increased. The solid pulse plasma thruster has the advantage of low cost, and is suitable for being used as a main thruster of a micro-nano satellite or an adjusting device of various large satellites.

The invention discloses a method and a device for data message forwarding. The method and the device aim at improving message forwarding speed. The method includes that when a network card terminal processing unit recognizes that a network card receives a data packet, a hardware interrupt processing unit is invoked to process, the hardware interrupt processing unit applies for an fk_buff data storage structure to copy the data packet into a data area of the fk_buff from the internet card, whether the data packet meets forwarding conditions or not is determined, if yes, a quick forwarding module obtains a corresponding forwarding path according to forwarding entries in a forwarding table set by quintuple information indexes of a data message and utilizes a hardware sending function to forward the data packet in the data area of the fk_buff, and if not, the fk_buff is taken as data of sk_buff to upload to a protocol stack for processing.

The invention discloses an industrial SDN network data transmission method and system capable of supporting packet header compression. The method includes: in a transmission preparation stage, an edge switch receives and forwards data to a controller, and the controller distributes an identifier ID for non-real-time data and sends a distribution result to a switch on a transmission path in the format of a flow table; and in a data transmission stage, the edge switch directly performs forwarding operation on real-time data, performs packet header compression / decompression on the non-real-time data, and forwards the data after a packet header adds / removes the identifier ID. A core switch matches the real-time data with L2 layer packet header information, matches the identifier ID with the non-real-time data, and forwards the data according to a matching flow table. The system comprises a controller and a switch capable of realizing functions of compression / decompression of the data packet header and identifier adding / removing. According to the method and system, the bandwidth cost can be reduced, the data forwarding speed can be increased, the data transmission efficiency is improved, more network resources are reserved for real-time data transmission of an industrial network, and the overall transmission performance of the industrial network is enhanced.

A method and apparatus for depositing synthetic filaments to form a non-woven web, wherein the filaments are drawn off from a spinneret through a drawing unit in a row-shaped arrangement using a feed fluid, accelerated into a guide channel and blown out as a filament stream toward an advancing deposit belt. The filament stream is deflected immediately before it impacts upon the deposit belt unilaterally in the advancing direction of the deposit belt in such a way that the filaments impact upon the deposit belt at an angle of <90°. For this purpose, a deflecting means is mounted immediately above the deposit belt.

The invention discloses a single packet source-tracing method based on storage resource adaptive adjustment. The method comprises steps of S1, the load capacity of each source-tracing router are estimated and storage resources are allocated to the source-tracing routers; S2, when IP packets are transmitted in a network, source-tracing routers establish tracing trails of the IP packets according to a label switching path establishment principle in a MPLS network; and S3, after a network attack is generated, a victim sends a source-tracing request and a source-tracing manager reconstructs an attack path according to the tracing trails. The method may increase resource utilization rate by estimating the load capacity of each source-tracing router and allocating storage resources to the source-tracing routers, and prevents a path fragment is covered alternately because of shortage of the storage resources and increases source-tracing precision by adaptively adjusting the storage resources of the source-tracing routers. Further, the method establishes the tracing trails of the IP packets according to the label switching path establishment principle in the MPLS network so as to greatly reduce storage cost.

The invention discloses a method for rapidly forwarding a data packet. The method includes that a three-layer device determines whether the data packet can be forwarded rapidly, if the data packet can be forwarded rapidly, the data packet is rewritten and then forwarded directly; and otherwise, the data packet is sent to a self protocol stack for processing and forwarding. The invention further discloses the three-layer device for rapidly forwarding the data packet. According to the method and the three-layer device for rapidly forwarding the data packet, repetitive work of the three-layer device for forwarding data packets can be reduced, and the forwarding speed of the data packets can be improved.

A rotor assembly (5) for a rotorcraft, such as a helicopter, includes rotors (7) rotatable about a hub (17). The assembly (5) is operable to vary the angular speed of the rotors (7) about the hub (17), relative to one another. The assembly (5) may include a drive operable to drive each of the rotors (7) at a different radial distance from the hub.

An embodiment of the invention provides a short message forwarding method and a terminal. The short message forwarding method comprises the following steps: the terminal receives a short message forwarding signal; according to the short message forwarding signal, a to-be-forwarded zone and an operation zone are displayed in a short message interaction interface by the terminal, and short message selection operation input via the operation zone is received; according to the short message selection operation, a short message indicated via the short message selection operation is added to the to-be-forwarded zone, the short message is stored in the terminal, object addressee information input via the operation zone is received, a short message sending signal is received, and the short message in the to-be-forwarded zone is sent to an object addressee. The short message forwarding method and the terminal can be used for simplifying short message forwarding processes.

The invention discloses a method for realizing expedited forwarding of data packets in a home gateway, which is realized during the process of performing routing rule matching on the data packets through a cpu (central processing unit) in the home gateway. The key points of the method are that data packet input and output interfaces and a routing rule memory are added in an exchanger module of the home gateway; after coming, the data packets are matched with rules stored in the routing rule memory in the exchanger module; if the matching is successful, the forwarding is directly performed from the exchanger module, and if the matching is unsuccessful, the forwarding enters and is performed through an Linux protocol stack, and the matching rule is recorded in a rule list of the routing rule memory; and when a similar data packet occurs next time, the forwarding can be directly performed through the exchanger module. By adopting the method, the purpose of hardware acceleration is realized, resources in the cpu are not occupied, and the forwarding speed of the data packets is greatly improved.

The invention relates to a multi-rotor aircraft, which comprises four main rotor systems, two auxiliary rotor systems, a body and a flying integrated system arranged in the body, wherein an original point of a coordinate system of the body is the gravity center of the aircraft; a z axis is vertical upwards; an x axis is vertical to the z axis and points to the front part; a y axis is determined by a right-hand rule; the four main rotor systems are respectively distributed inside four quadrants of an x-y plane of the body coordinate system; each rotary axis of the four main rotor systems and the z axis of the body coordinate system form an included angle theta, and a projection of each rotary axis on an x-o-y plane of the body coordinate system is overlapped with the projection of a connection line from a rotation center to the original point of the body coordinate system on the x-o-y plane of the body coordinate system. According to the invention, movement and gesture change of the aircraft can be achieved by adjusting rotating speed of the four main rotor systems and the two auxiliary rotor systems; and the aircraft can achieve the actions such as vertical take-off and landing, forward flying, reverse flying, hovering, rolling and the like, and the stability and the controllabitity are good.

The invention discloses a method, a router and a system of forwarding messages, and belongs to the technical field of communication. The method comprises that: the router receives a first message through a first interface of the router, wherein the first interface is a user border side interface or a wide area network side interface; and the router inquires a virtual routing forwarding (VRF) table entry corresponding to the destination address of the first message according to the destination address of the first message received through the first interface, wherein the VRF table entry corresponding to the destination address of the first message comprises a first next hop and a second next hop, when the first next hop is address information of an application accelerating device, the router confirms that the address information of the application accelerating device is a next hop of the first message, the first message is sent to the application accelerating device, application acceleration processing of the first message is conducted, and therefore a second message is obtained.

The invention provides a message transmitting method, comprising: building IPoIB subinterfaces under IPoIB master interface of IB-Eth gateway, where an IPoIB subinterface is bound with an Ethernet interface IP address and Ethernet address handle corresponding to the IP address; IB side sends IP message, which is to be sent to the Ethernet interface or other equipment through the Ethernet interface, to the IPoIB subinterface bound with the Ethernet interface IP address; the IPoIB subinterface receives the IP message and then transmits the IP message to the corresponding Ethernet interface to an Ethernet interface IP address that it is bound with. In addition, the invention provides a message transmitting system and device. And the invention can save the processing time for message transmission on IB-Eth gateway, speeding up message transmission and thus raising the message transmitting efficiency of the IB-Eth gateway.

The invention provides a data message forwarding method and device based on a two-dimensional routing policy. The method comprises the steps of storing only an FIB table in a ternary content addressable memory (TCAM), and storing a primary index table, a TD table and a next-hop mapping table in a static random access memory (SRAM); searching the FIB table for a target prefix by using a target address of a data message; searching the FIB table for a source prefix by using a source address of the data message; obtaining a target prefix index from the first primary index table according to the target prefix; obtaining a source prefix index from the first primary index table according to the source prefix; obtaining a next-hop index from the TD table according to the target prefix index and the source prefix index; and obtaining next-hop information from the next-hop mapping table by using the next-hop index. The invention can effectively avoid the problem of enlarged storage space of the TCAM due to the adding of a source prefix forwarding table.